The median income for a hoosehauld in the coonty wis $70,835, an the median income for a faimily wis $81,856 (thir figures haed risen tae $77,671 an $91,881 respectively as o a 2007 estimate).[6] Males haed a median income o $57,392 versus $36,604 for females. The per caipita income for the coonty wis $33,345. Aboot 3.30% o faimilies an 4.90% o the population wur belaw the poverty line, includin 5.10% o those unner age 18 an 7.10% o those age 65 or ower. Based on median hoosehauld income, as o 2006, Collin Coonty is the seicont richest coonty in Texas efter Fort Bend, an is considered ane o the walthiest coonties in the Unitit States.

Collin Coonty is a Republican stranghauld in presidential an congressional elections. The last Democrat tae win the coonty wis Lyndon Johnson in 1964. As the northren Dallas suburbs spilled intae Collin Coonty in the late 1960s an early 1970s its politics immediately swung tae the Republican Pairty.